/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package edu.ccut.titan.component.impl;

import java.util.LinkedList;
import java.util.List;

import edu.ccut.titan.component.IParameter;
import edu.ccut.titan.component.IParameterContext;

/**
 * {@link IParameterContext} implementation
 * 
 * @see IParameterContext
 * @author LeslieGu
 * 
 */
public class TitanParameterContext implements IParameterContext {

	private Throwable exception;

	private List<IParameter> parameters;

	public TitanParameterContext() {
		this.parameters = new LinkedList<IParameter>();
	}

	public Throwable getException() {
		return exception;
	}

	public void setException(Throwable exception) {
		this.exception = exception;
	}

	public List<IParameter> getParameters() {
		return parameters;
	}

	public IParameter getParameter(int i) {
		if (i < this.parameters.size()) {
			return this.parameters.get(i);
		}

		return null;
	}

	public Object getParameterValue(int i) {
		return this.getParameter(i).getValue();
	}

	public void setParameter(int i, Object value) {
		if (i < this.parameters.size()) {
			this.parameters.get(i).setValue(value);
		}
	}

	public void addParameter(Object value, Class<?> valueType) {
		this.parameters.add(new TitanParameter(value, valueType));
	}
}
